Proportion of Subjects in the Full Analysis Set (FAS) Remaining Seizure Free for 6 Consecutive Months (26 Consecutive Weeks) of Treatment Following Stabilization at the Last Evaluated Dose for Each Subject

Proportion of Subjects in the Per Protocol Set (PPS) Remaining Seizure Free for 6 Consecutive Months (26 Consecutive Weeks) of Treatment Following Stabilization at the Last Evaluated Dose for Each Subject

Number of Subjects With at Least One Treatment-emergent Adverse Event (AE) During the Treatment Phase (up to 113 Weeks)